crash with -Xjcov and union types

[Liam Miller-Cushon]

Thanks Joel. I discovered this while using -Xjcov to force end positions to
be collected. I realize there are better ways to do that, but it's probably
still worth fixing.

On Tue, Sep 30, 2014 at 1:38 AM, Joel Borggrén-Franck <
joel.franck at oracle.com> wrote:

> Hi Liam,
>
> On 25 Sep 2014, at 23:57, Liam Miller-Cushon <cushon at google.com> wrote:
>
> > I'm seeing crashes with -Xjcov enabled while compiling code with union
> types. This seems to affect javac 7 through 9. I've attached a possible
> fix, and a jtreg test for the crash.
> >
> > Repro:
> >
>
> Thanks for the report and fix! I have filed
> https://bugs.openjdk.java.net/browse/JDK-8059453
>
> I don’t know enough about -Xjcov to review and commit your fix right now,
> but I’ll try to make this happen soon.
>
> cheers
> /Joel
>
>
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